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From "Matthias Boehm (JIRA)" <j...@apache.org>
Subject [jira] [Resolved] (SYSTEMML-1459) Wrong codegen materialization decisions due to dangling hop parents
Date Tue, 04 Apr 2017 19:08:41 GMT

     [ https://issues.apache.org/jira/browse/SYSTEMML-1459?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Matthias Boehm resolved SYSTEMML-1459.
--------------------------------------
       Resolution: Fixed
         Assignee: Matthias Boehm
    Fix Version/s: SystemML 1.0

> Wrong codegen materialization decisions due to dangling hop parents
> -------------------------------------------------------------------
>
>                 Key: SYSTEMML-1459
>                 URL: https://issues.apache.org/jira/browse/SYSTEMML-1459
>             Project: SystemML
>          Issue Type: Bug
>            Reporter: Matthias Boehm
>            Assignee: Matthias Boehm
>             Fix For: SystemML 1.0
>
>
> The cost-based codegen plan selector uses hops with multiple consumers as candidates
for decisions on materalization points. On end-to-end algorithm scenarios, we encountered
side effects from specific dynamic simplification rewrites which did not properly cleanup
parent-child pointers of removed hops.



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